CN108430774B

CN108430774B - Adhesive laminated core manufacturing device

Info

Publication number: CN108430774B
Application number: CN201680075838.4A
Authority: CN
Inventors: 郑日权; 林世钟; 薛长焕; 李承喆; 朴昌墩; 池正圭; 李栽永
Original assignee: Posco Daewoo Corp
Current assignee: Posco International Corp
Priority date: 2015-12-22
Filing date: 2016-08-11
Publication date: 2020-08-21
Anticipated expiration: 2036-08-11
Also published as: JP6721943B2; CN108430774A; US10672552B2; US20180374625A1; JP2019504610A; WO2017111249A1

Abstract

Disclosed is an adhesive laminated core manufacturing apparatus which passes a strip-shaped base material coated with an adhesive layer on the surface thereof and sequentially forms sheet members of a predetermined shape, and then sequentially manufactures laminated cores including sheet members integrated in a predetermined number of sheets by interlayer lamination. An apparatus for manufacturing an adhesive laminated core according to an aspect of the present invention includes: a protrusion forming unit for pressing the base material to form an interlayer division protrusion from the surface of the base material at each predetermined position along the length direction of the base material, for dividing the laminated cores; a Blanking unit that performs Blanking (Blanking) on the base material to sequentially form the sheet member; and a lamination unit that integrates the sheet members to sequentially manufacture the laminated core. According to the present invention, a laminated core in which a thin sheet member is integrated by being laminated between a predetermined number of sheets of layers can be continuously manufactured using a strip-shaped base material having an adhesive layer coated on a surface thereof.

Description

Adhesive laminated core manufacturing device

Technical Field

The present invention relates to a core manufacturing apparatus for manufacturing an iron core (i.e., a core) of a motor, a generator, or the like, and more particularly, to a bonded-type laminated core manufacturing apparatus for manufacturing a laminated core by bonding sheet members (thin plates) between layers.

Background

Generally, a laminated Core (Laminate Core) obtained by laminating a thin sheet member (e.g., a metal thin plate) in multiple layers and integrating them is used as a Rotor (Rotor) or a Stator (Stator) of a generator, a motor, or the like, and as a method for manufacturing the laminated Core, that is, as a method for manufacturing a laminated Core in which the thin sheet members are laminated and fixed integrally, there are a tab (tab) fixing method using an interlocking tab (Interlock tab), a welding fixing method using welding (e.g., laser welding), a caulking fixing method, and the like.

As the label fixing method, korean laid-open patent publication nos. 10-2008-0067426 and 10-2008-0067428 disclose techniques for manufacturing a laminated core, but the method for manufacturing a laminated core has a problem of Iron Loss (Iron Loss), and particularly, the label fixing method has a limitation as a manufacturing technique of a laminated core because Embossing (Embossing) is difficult due to a tendency of a base material (i.e., a steel plate) to be thin. The above-mentioned patent publications and the following patent documents disclose various types and shapes of laminated cores.

Further, recently, a bonding and fixing method for bonding sheet members of unit sheets (i.e., single sheets) constituting the laminated core to each other by an adhesive to be integrated has been disclosed, which is disclosed in Korean laid-open patent publication No. 10-1996-003021 and Japanese laid-open patent publication No. 5-304037.

In the patent documents as described above, reference is made to japanese laid-open patent publication No. 5-304037 in which a base material (i.e., a steel sheet) for manufacturing a motor core is supplied to a first press-molding machine and a second press-molding machine by means of transfer rollers, and an adhesive is applied to the steel sheet by means of an application roller and a nozzle before passing through the first press-molding machine.

Further, core materials (i.e., sheet members) sequentially stacked in the internal spaces of the first press molding machine and the second press molding machine by punching of the base material are integrated by the adhesive agent, and thereby an adhesive type laminated core is manufactured. According to the conventional adhesion fixing method, that is, the adhesion type laminated core manufacturing method, costs can be saved compared to laser welding, and the method can cope with the thinning of the steel sheet.

Disclosure of Invention

Technical problem

An object of the present invention is to provide a bonded laminated core manufacturing apparatus capable of continuously manufacturing a core laminated body (i.e., a laminated core) such as a motor or a generator by receiving a strip-shaped base material having an adhesive layer on the surface thereof.

Technical scheme

An aspect of the present invention provides an adhesive laminated core manufacturing apparatus for sequentially forming a sheet member of a predetermined shape while passing a strip-shaped base material having a surface coated with an adhesive layer through a predetermined pitch each time, and sequentially manufacturing laminated cores including sheet members integrated by a predetermined number of sheets through interlayer adhesion, the adhesive laminated core manufacturing apparatus including: a protrusion forming unit for pressing the base material to divide the laminated cores, so that protrusions for interlayer division are formed on the surface of the base material every time the base material is transferred by a plurality of preset pitches; a blanking unit disposed at a downstream side than the protrusion forming unit to blank the parent material to sequentially form the sheet member; and a lamination unit that integrates the sheet members to sequentially manufacture the laminated core.

The blanking unit includes: a Punch for punching (Punch) provided in an upper mold that is capable of being lifted and lowered so as to press and Punch the base material, and disposed downstream of the protrusion forming unit with respect to a transfer direction of the base material; and a punching die supported by a lower die disposed below the upper die, having a punching hole facing the stamping member, and stacked on an upper side of the lamination unit.

And, the protrusion forming unit is a configuration capable of selectively synchronizing (synchronizing) to the blanking unit so that the protrusions are periodically formed at the mother material every time the blanking is performed a preset number of times.

The protrusion forming unit may include a forming assembly of at least one of a first forming assembly and a second forming assembly, the first forming assembly including: a lower molding die provided to the lower die; and an upper molding tool provided to the upper mold so as to face the lower molding tool, the second molding member including: an upper molding die provided to the upper die; and a lower molding tool provided to the lower mold so as to face the upper molding mold.

And, the lower molding die has a lower molding groove depressed downward from an upper side of the lower molding die, and the upper molding die has an upper molding groove depressed upward from a lower side of the upper molding die.

The upper molding tool may be provided in the upper mold so as to be movable up and down, and the lower molding tool may be provided in the lower mold so as to be movable up and down.

The lower molding die and the upper molding die are respectively provided at the lower die and the upper die at a predetermined interval in a transfer direction of the base material and staggered with each other, and the upper molding die is formed downstream of the lower molding die with respect to the transfer direction of the base material.

The first molding member may be provided at the one pitch distance from the second molding member. The upper side surface of the lower molding die and the lower side surface of the upper molding die have surface shapes that are Mirror images (Mirror images) of each other, and the upper molding die is provided at a position shifted (Shift) by one pitch from directly above the lower molding die.

The upper mold may include: the upper frame can be lifted; and a plate-shaped pusher provided below the upper frame to press the base material downward, wherein the upper forming tool is supported by the upper frame to penetrate through the pusher to press an upper surface of the base material, and the upper forming tool is supported by the upper frame to penetrate through the pusher to support the upper surface of the base material.

The upper mold may be divided into a plurality of bodies or configured as one integrated body along the transfer direction of the base material, and the lower mold may be divided into a plurality of bodies or configured as one integrated body along the transfer direction of the base material.

The stamping part is lifted and lowered by the upper die once every time the base material moves by the one pitch, and the protrusion forming unit is selectively synchronized with the stamping unit so that the protrusion is formed on the base material at intervals of a plurality of pitches in a length direction of the base material.

The punching die may be provided in the lower die at a distance of N pitches (N is a natural number of 1 or more) from the protrusion forming unit in the transfer direction of the base material. Also, the laminating unit may be rotatably equipped to the lower mold.

The protrusion forming unit presses one side surface of the base material to form the interlayer division protrusion on the other side surface of the base material, in order to divide the laminated cores. More specifically, the protrusion forming unit may include: a protrusion forming tool including a pressing protrusion having a flat tip end surface and a tip end portion having a constant thickness for forming the protrusion for interlayer division, and pressing one surface of the base material at predetermined intervals in synchronization with the punching unit; and a molding die facing the pressing projection and having a projection molding groove corresponding to a shape of a front end portion of the pressing projection.

In other words, another aspect of the present invention provides an adhesive laminated core manufacturing apparatus including: a protrusion forming unit for pressing one side surface of the base material to form a protrusion for interlayer division on the other side surface of the base material for division between the laminated cores; a Blanking unit disposed downstream of the protrusion forming unit with respect to a transfer direction of the base material, and configured to sequentially form the sheet member by Blanking (Blanking) the base material; and a lamination unit that integrates the sheet members to sequentially manufacture the laminated core, wherein the protrusion forming unit includes: a protrusion forming tool including a pressing protrusion having a flat tip end surface and a tip end portion having a constant thickness for forming the protrusion for interlayer division, and pressing one surface of the base material at predetermined intervals in synchronization with the punching unit; and a molding die facing the pressing projection and having a projection molding groove corresponding to a shape of a front end portion of the pressing projection.

The pressing protrusion of the protrusion forming tool may be downwardly disposed to press the upper side of the base material to the lower side, and the forming die may be provided at the lower side of the protrusion forming tool to support the bottom surface of the base material. Of course, it is also possible to arrange the opposite configuration thereof, i.e. the configuration in which the projection forming tool faces the underside of the projection formation.

A pusher for separating the interlayer dividing projection from the molding die is provided in the projection molding groove, and the pusher is elastically supported toward an inlet side of the projection molding groove.

The protrusion forming tool is selectively lowered by means of an elevator so that the upper side of the parent material is pressurized every predetermined period.

The protrusion forming tool may be provided at an upper support table, the forming die may be provided at a lower support table, the upper support table may be provided at an upper side of the lower support table in a liftable manner, the lower support table may be provided at a lower side of the upper support table in a manner to face the upper support table, the upper support table may be integrated with the upper die or may be spaced apart from the upper die, and the lower support table may be integrated with the lower die or may be spaced apart from the lower die.

Advantageous effects

The adhesive laminated core manufacturing apparatus according to one aspect of the present invention has the following effects.

First, according to one aspect of the present invention, a laminated core in which a sheet member is integrated for a predetermined number of base materials by an interlayer adhesion method can be continuously manufactured using a strip-shaped base material having a surface coated with an adhesive layer.

Secondly, according to an aspect of the present invention, since the projections for interlayer division are selectively formed on the surface of the strip-shaped base material at predetermined intervals in synchronization with the punching process of the base material, the sheet member can be easily divided for each predetermined number of sheets, and the manufacturing of the laminated core and the interlayer division can be easily realized.

Thirdly, according to an aspect of the present invention, the protrusion forming means is driven to punch the base material at one pitch interval in the longitudinal direction while transferring the base material by one pitch, and forms the protrusion on the base material at intervals of a plurality of pitches, thereby enabling the sheet member to be integrated once per a predetermined number of sheets and enabling the limit between the lamination cores to be accurately set.

Fourth, according to an aspect of the present invention, since the region where the sheet members are aligned and stacked, the region where the sheet members are integrated, and the region where the stacked cores are discharged in the lamination unit are precisely interlocked and integrally rotated, it is possible to minimize thickness variation of the stacked cores and to realize high-precision core manufacturing.

Drawings

A more complete understanding of the features and advantages of the present invention will be obtained by reference to the following detailed description of embodiments of the invention when considered in conjunction with the accompanying drawings, wherein:

fig. 1 is a vertical cross-sectional view schematically showing the structure of an adhesive laminated core manufacturing apparatus according to an embodiment of the present invention with reference to the transfer direction of a base material.

Fig. 2 is a view showing a state where a base material is supplied to the bonded laminated core manufacturing apparatus shown in fig. 1.

Fig. 3 is a view showing a first molding member as an embodiment of a protrusion molding unit applicable to the adhesive laminated core manufacturing apparatus shown in fig. 1.

Fig. 4 is a view showing a second molding member as another embodiment of a protrusion molding unit applicable to the adhesive laminated core manufacturing apparatus shown in fig. 1.

Fig. 5 is a view showing a process of forming the interlayer dividing protrusion by the protrusion forming unit shown in fig. 3 and 4.

Fig. 6 is a view showing a state in which the projection forming unit shown in fig. 3 and 4 is retreated.

Fig. 7 is a perspective view showing an example of an adhesive laminated core that can be produced by the present invention and a sheet member used for the same.

Fig. 8 is a process flow diagram showing one example of manufacturing the laminated core shown in fig. 7.

Fig. 9 is a longitudinal sectional view illustrating a blanking unit and a laminating unit of the adhesive laminated core manufacturing apparatus shown in fig. 1.

Fig. 10 is a sectional view schematically showing the lamination unit shown in fig. 9.

Fig. 11 is a sectional view showing a process in which a thin sheet member is integrated inside (lamination hole) of the lamination unit shown in fig. 10.

Fig. 12 is a view showing the pressing member and the rotary case shown in fig. 9.

Fig. 13 is a plan view schematically illustrating an embodiment of a nip applicable to the laminating unit shown in fig. 9.

Fig. 14 is a diagram schematically showing a rotation mechanism of the laminating unit shown in fig. 10.

Fig. 15 is a vertical cross-sectional view schematically showing the structure of an adhesive laminated core manufacturing apparatus according to another embodiment of the present invention with reference to the transfer direction of the base material.

Fig. 16 is a view showing a state in which a base material is supplied to an adhesive laminated core manufacturing apparatus according to still another embodiment of the present invention.

Fig. 17 is a view showing a projection forming unit of the adhesive laminated core manufacturing apparatus shown in fig. 15 and 16.

Fig. 18 is a perspective view schematically showing the protrusion forming unit shown in fig. 17.

Fig. 19 is a view showing a process of forming the interlayer dividing protrusion in the base material by the protrusion forming unit shown in fig. 17.

Fig. 20 is a diagram showing a state after the protrusion forming tool of the protrusion forming unit shown in fig. 3 is retreated (raised).

Fig. 21 is a view showing a laminated state of a sheet member molded by the adhesive laminated core manufacturing apparatus shown in fig. 15 and 16.

Fig. 22 is a view showing a process (process flow) of manufacturing the laminated core shown in fig. 7 by using the adhesive laminated core manufacturing apparatus shown in fig. 15 and 16.

Fig. 23 is a sectional view showing a process of integrating the sheet member in the lamination unit (lamination hole) shown in fig. 15 and 16.

Best mode for carrying out the invention

Hereinafter, preferred embodiments of the present invention, which can be used for specifically achieving the objects of the present invention, will be described with reference to the accompanying drawings. In the description of the present embodiment, the same components are given the same names and the same reference numerals, and additional description thereof will be omitted.

An embodiment of the present invention relates to an adhesive laminated core manufacturing apparatus that manufactures cores of motors, generators, and the like by punching (Blanking) a strip-shaped base material continuously transferred, for example, by a predetermined pitch distance, and integrating the sheet members by interlayer bonding.

Specifically, the embodiments of the present invention relate to an adhesive laminated core manufacturing apparatus capable of receiving a strip-shaped base material (a steel sheet for manufacturing a core, the surface of which is coated with an adhesive layer) coated with an adhesive layer to manufacture the above-described core, i.e., a laminated core. The laminated core constitutes at least a part of a core for a stator or a rotor.

First, an embodiment (first embodiment) of an adhesive laminated core manufacturing apparatus according to the present invention will be described with reference to fig. 1 to 4.

In the drawings for explaining an embodiment of the present invention, fig. 1 is a vertical sectional view schematically showing the structure of an adhesive laminated core manufacturing apparatus according to the present invention with reference to the transfer direction of a base material, fig. 2 is a view showing a state where a base material is supplied to the adhesive laminated core manufacturing apparatus shown in fig. 1, fig. 3 is a view showing a first molding unit as an embodiment of a protrusion molding unit applicable to the adhesive laminated core manufacturing apparatus shown in fig. 1, and fig. 4 is a view showing a second molding unit as another embodiment of a protrusion molding unit applicable to the adhesive laminated core manufacturing apparatus shown in fig. 1.

An embodiment of an adhesive laminated core manufacturing apparatus (hereinafter referred to as "core manufacturing apparatus") according to the present invention is based on a punching system that sequentially forms a thin sheet member L of a predetermined shape while passing a strip-shaped base material S having a surface coated with an adhesive layer 1, and then sequentially manufactures a laminated core C including thin sheet members integrated in a predetermined number of sheets by interlayer adhesion.

Referring to fig. 1 to 4, an adhesive laminated core manufacturing apparatus according to an aspect of the present invention includes: a protrusion forming unit 100 for division between the laminated cores C; a blanking unit 200 for sequentially forming the sheet member L by blanking; and a laminating Unit (Laminate Unit)300 that integrates the sheet member L by a predetermined number of sheets to form the laminated core C.

The protrusion forming unit 100 presses the base material S to form a protrusion P, i.e., a protrusion for interlayer division, at each predetermined position in the longitudinal direction of the base material S, so that when the above-described laminated cores C are manufactured using the strip-shaped base material S having the adhesive layer 1 coated on the surface thereof, division between the laminated cores C can be achieved. The protrusions P form gaps (Gap) between adjacent sheet members to reduce the contact area between the sheet members.

The punching unit 200 sequentially forms the sheet members L by punching (Blanking) the base material, and sequentially supplies the sheet members L to the inside of the laminating unit 300 to be laminated. The laminating unit 300 integrates the sheet members L laminated in the up-down direction by the punching into a predetermined unit of a plurality of layers, and sequentially manufactures the laminated core C.

In the present embodiment, the blanking unit 200 includes: a stamping Punch (Punch)210 provided in the upper die 10; and a punching Die (Die)220 provided in the lower Die 20.

More specifically, the upper die 10 is provided above the lower die 20 so as to be movable up and down for pressing and punching the base material S. The punching punch 210 is attached to the upper die 10 and is disposed downstream of the protrusion forming unit 100 with respect to the transfer direction of the base material S. Therefore, the punching punch 210 moves up and down together with the upper die 10 to punch the base material S.

The punching die (die)220 has a punching hole 221 facing the punching punch 210, is supported by the lower die 20 by being attached to the lower die 20, and is stacked on the upper side of the lamination unit 300.

In the present embodiment, the protrusion forming unit 100 is configured to be selectively synchronized (Synchronization) with the punching unit 200 so that the protrusion P is formed on the surface of the base material S every time the punching is performed a predetermined number of times.

For example, the punching stamp 210 is lifted and lowered by the upper die 10 once every time the base material S moves by a predetermined pitch (pitch). In other words, the parent material S passes through a pitch between the upper die 10 and the lower die 20 every Stroke (Stroke) of the pressing, i.e., a Stroke of the punching part 210, and the protrusion forming is performed every predetermined Timing (Timing) before the punching process.

The protrusion forming unit 100 may be selectively synchronized with the blanking unit 200 such that the protrusions P are formed on the parent material S at intervals of a plurality of pitches in a length direction of the parent material S. In the case where the laminated core C is a laminate of ten layers, the projections P are formed in the same Pattern (Pattern) on the surface of the base material S at intervals of ten pitches in the longitudinal direction (the transfer direction of the base material) of the base material.

In this embodiment, the punching die 220 is provided in the lower die 20 at a distance of N pitches (N is a natural number of 1 or more) from the protrusion forming unit 100 in the transfer direction of the base material.

The protrusion forming unit 100 may include at least one of a first forming member 100A formed by protruding the protrusion P downward and a second forming member 100B formed by protruding the protrusion P upward. In the present specification, the term "first" or "second" does not indicate the order of molding components or the number of molding components, and is used only for distinguishing the case where the lower mold 20 is equipped with a molding mold from the case where the upper mold 10 is equipped with a molding mold.

When a projection formed to project downward from the surface of the base material is referred to as a lower projection P1 and a projection formed to project upward is referred to as an upper projection P2, the lower projection P1 is formed on the base material S in the first molding unit 100A and the upper projection P2 is formed on the base material S in the second molding unit 100B. Therefore, the protrusion forming unit 100 of the present embodiment may also be referred to as an Embossing Apparatus (Embossing Apparatus).

As the base material S, a double-coated base material in which the adhesive layer 1 is coated on both side surfaces (upper and lower side surfaces) may be used, or a single-coated base material in which the adhesive layer is coated only on one of the upper and lower side surfaces may be used. In the present embodiment, as an apparatus for manufacturing laminated cores using the base material S having the adhesive layers 1 formed on both side surfaces thereof, the first molding unit 100A and the second molding unit 100B are all included in order to more smoothly divide the laminated cores C, but the present invention is not limited thereto.

In other words, when both side surfaces of the base material S are coated with the adhesive layer 1, the interlayer division of the laminated core C can be achieved by only one of the first molding member 100A and the second molding member 100B. If the above-mentioned projections P are periodically formed at predetermined pitches in the longitudinal direction of the parent material S only on one of the upper and lower sides of the parent material S, the interlayer adhesive force between the sheet members can be relatively weakened in units of a predetermined number of sheets.

More specifically, the first molding assembly 100A includes: a lower molding die 110A provided in the lower die 20; and an upper molding tool 120A provided in the upper mold 10 to press an upper side surface of the base material S downward. The upper molding tool 120A is disposed directly above the lower molding die 110A so as to face the lower molding die 110A, and is lifted and lowered together with the upper die 10.

The lower molding die 110A has a lower molding groove 111A recessed downward from an upper side of the lower molding die 110A, and in the present embodiment, a plurality of lower molding grooves 111A are formed on the upper side of the lower molding die 110A.

The upper molding tool 120A is provided in the upper mold 10 so as to be movable up and down. In the present embodiment, the upper forming tool 120A includes a liftable upper tool base 121A and an upper pressing portion 122A provided on the upper tool base 121A, and a front end (lower end) of the upper pressing portion 122A has a shape corresponding to the lower forming groove 111A.

The second molding assembly 100B includes: an upper mold 110B provided in the upper mold 10; and a lower molding tool 120B provided to the lower mold 20 to press the lower side of the base material S upward. The lower molding tool 120B is disposed directly below the upper molding die 110B so as to face the upper molding die 110B, and the upper molding die 110B is lifted and lowered together with the upper die 10.

The upper molding die 110B has an upper molding groove 111B recessed upward from a lower side surface of the upper molding die 110B, and in the present embodiment, a plurality of upper molding grooves 111B are formed in the lower side surface of the upper molding die 110B.

The lower molding tool 120B is provided in the lower mold 20 so as to be movable up and down. In the present embodiment, the lower molding tool 120B includes a lower tool base 121B that can be lifted and lowered, and a lower pressing portion 122B provided in the lower tool base 121B, and a front end (upper end) of the lower pressing portion 122B has a shape corresponding to the upper molding groove 111B.

In the present embodiment, the lower molding groove 111A and the upper molding groove 111B are triangular grooves, but the shapes of the lower molding groove 111A and the upper molding groove 111B are not limited thereto. For example, the lower molding groove 111A and the upper molding groove 111B may be modified to have various shapes such as a hemispherical shape or a semi-elliptical shape. However, a shape that minimizes the contact area of the lower projections of the lower layer with the upper projections of the upper layer is more preferable.

In this embodiment, the lower forming die 110A and the upper forming die 110B are respectively disposed on the lower die 20 and the upper die 10 at a predetermined interval in the transfer direction of the base material S and staggered with each other. The upper forming tool 120A and the lower forming tool 120B are also respectively disposed on the upper die 10 and the lower die 20 at a predetermined interval in the transfer direction of the base material S and staggered with each other.

More specifically, the upper molding tool 120A and the lower molding tool 120B are provided in a tool receiving portion 10A and a tool receiving portion 20A so as to be movable up and down, respectively, and the tool receiving portion 10A and the tool receiving portion 20A are formed in the upper mold 10 and the lower mold 20, respectively. The

tool receiving portions

10a and 20a of the upper and lower molds are formed at positions staggered from each other.

In this embodiment, the first molding unit 100A and the second molding unit 100B are arranged at a distance of one pitch (transfer distance of the base material per punching). Therefore, the tool receiving portion 10a of the upper die is formed on the upstream side, more specifically, the upstream side of one pitch, with respect to the transfer direction of the base material S than the tool receiving portion 20a of the lower die.

The upper surface of the lower molding die 110A and the lower surface of the upper molding die 110B have Mirror-Image (Mirror Image) surface shapes that are plane-symmetrical to each other, and the upper molding die 110B is disposed at a position shifted (Shift) by one pitch from directly above the lower molding die 110A. Therefore, the lower protrusion P1 formed by the first molding member 100A and the upper protrusion P2 formed by the second molding member 100B can be stacked to face each other in a straight line.

The upper mold 10 may be divided into a plurality of

bodies

10b and 10c along the transfer direction of the base material S, or may be configured as an integral body. The lower mold 20 may be divided into a plurality of

bodies

20b and 20c along the transfer direction of the base material S, or may be configured as an integral body. The core manufacturing apparatus shown in fig. 2 is configured to include an integral upper mold and an integral lower mold.

In the present embodiment, the upper die 10 is provided with a presser (presser), i.e., a pressing member, which presses the base material S toward the lower die 20. Therefore, when the upper die 10 is lowered, the upper surface of the base material S is pressed downward by the presser 12, and the base material S is pressurized toward the lower die 20.

The upper mold 10 includes: an upper frame 11 which is provided above the lower mold 20 so as to be movable up and down; and the pusher 12 provided below the upper frame 11. In the present embodiment, the punching punch 210 is provided in the upper die 10, more specifically, in the upper frame 11 together with the pusher 12.

In the present embodiment, the pusher 12 functions as a Stripper (Stripper) in the punching step, the Piercing step, and the like, and also functions as a compression Plate or a pressure Plate for pressing the base material S toward the lower die 20 in the punching step, the Piercing step, and the like, and is a Plate-shaped Pushing Plate (Pushing Plate) in the present embodiment.

An elastic member (e.g., a coil spring) 12a for elastically pressing the pusher 12 and a lifting guide 12b for guiding the lifting of the pusher 12 are provided between the pusher 12 and the upper frame 11.

The lower mold 20 includes: a base frame (Bolster)21 constituting a base portion of the lower mold 20; and

lower molds

22 and 23 provided on the upper side of the base frame.

In the present embodiment, the

lower molds

22 and 23 are provided with the lower molding die 110A and the lower molding tool 120B. Also, the

lower molds

22, 23 may be divided into a mold frame 22 constituting an upper side of the lower mold and a mold holder (die holder)23 provided at a lower side of the mold frame 22.

The die holder 23 is stacked on the base frame so as to be supported by the base frame while supporting the die frame 22, but the structure of the lower die 20 is not limited thereto, and the die holder 23 may be divided into a plurality of parts. In the present embodiment, the lower dies 22 and 23 are provided with the punching die 220, the lower molding die 110A, and the lower molding tool 120B.

The upper molding tool 120A, more specifically, the upper pressing portion 122A is supported by the upper frame 11 so as to penetrate the pusher 12 and press the upper surface of the base material S. The upper molding die 110B is supported by the upper frame 11 so as to penetrate the pusher 12 and lift the upper surface of the base material S. For this purpose, the pusher 12 is formed with a tool hole 12d through which the upper molding tool 120A passes and a die hole 12e through which the upper molding die 110B passes.

In addition, the upper forming tool 120A and the lower forming tool 120B are lifted by means of a lifter 400, such as a cam mechanism or a hydraulic/pneumatic cylinder, so as to adjust the up-down positions of the upper forming tool 120A and the lower forming tool 120B. That is, at the time when the protrusion formation is required, the upper forming tool 120A is lowered by the lifter 400 to be advanced downward, and the lower forming tool 120B is raised by the lifter 400 to be advanced upward.

In other words, when the lifter 400 moves (pushes) the upper forming tool 120A and the lower forming tool 120B to the base material S at predetermined intervals, the upper side surface and the lower side surface of the base material S can be pressed downward and upward by the upper forming tool 120A and the lower forming tool 120B, respectively, when the upper die 10 is lowered. In this embodiment, the lifters 400 are respectively disposed in the tool receiving portions 10A and 20A of the upper and lower molds and coupled to the upper and

lower molding tools

120A and 120B.

Therefore, the upper forming tool 120A is lowered to a bottom dead center (bottom dead point) every predetermined period by the lifter 400, and the lower forming tool 120B is raised to the top dead center every predetermined period by the lifter 400. After the protrusion forming process, the upper forming tool 120A and the lower forming tool 120B are retracted by the lifter 400, thereby preventing contact with the base material S until the next cycle.

More specifically, in the case where the laminated cores C have a ten-layer structure composed of ten sheet members, the base material S is subjected to the protrusion forming process once every ten-pitch movement, and thus interlayer division between the laminated cores C can be achieved.

For this, the lifter 400 lifts the upper and

lower molding tools

120A and 120B (lowers the upper molding tool and raises the lower molding tool) once every time the parent material S moves ten pitches. In the laminated structure of the sheet member shown in fig. 2, the broken line is a portion where interlayer adhesion is achieved, and the solid line is a portion where interlayer division is achieved by the projection P.

In the solid line portion, a lower projection P1 is formed on the upper-layer sheet member and an upper projection P2 is formed on the lower-layer sheet member among the sheet members of the adjacent two layers.

Referring to fig. 3, in the present embodiment, the lifter 400 may include: a lifting body 410 which supports the upper molding tool 120A and the lower molding tool 120B and is provided in the tool receiving portion 10A of the upper mold and the tool receiving portion 20A of the lower mold so as to be capable of lifting, respectively; and a Lifter (Lifter)420 that lifts and lowers the lifting body 410.

In the present embodiment, the lifting body 410 is fixed to the upper molding tool 120A and the lower molding tool 120B, respectively, and the upper molding tool 120A and the lower molding tool 120B are integrally movable with the lifting body 410. A lift rod 430 is coupled to the lift body 410 so as to vertically penetrate the lift 420.

The lifter 400 according to the present embodiment has a cam structure, and the lifting/lowering of the lifting body 410 is achieved by the left-right direction sliding of the lifter 420. In other words, the lifting body 410 and the lifting lever 430 are lifted from the original positions, and the lifting body 410 is moved in the up-and-down direction by the left-and-right movement of the lifter 420. Of course, the construction and operation of the lifter are not limited to the above examples.

Hereinafter, the operation of the protrusion forming unit 100 according to the present embodiment will be described in more detail with reference to fig. 5 and 6.

The parent material S is moved by a predetermined distance (one pitch) every one cycle of the upper die 10, that is, one Stroke (Stroke) of the press, so as to pass between the pusher 12 and the die frame 22, and as shown in fig. 5 (a), if a predetermined portion of the parent material S reaches a protrusion forming position, at the same time or before, the upper forming tool 120A is lowered to a bottom dead center by the lifter 400, and the lower forming tool 120B is raised to a top dead center by the lifter 400.

When the lower die 20 is lowered as shown in fig. 5 (b), the upper surface of the base material S is pressed by the pusher 12, and the lower surface of the base material S is brought into close contact with the lower die 20. At this time, the upper molding tool 120A presses the upper surface of the base material S, and further, the lower protrusion P1 is formed by the interaction with the lower molding die 110A.

The lower molding tool 120B presses the lower side of the parent material S while forming the lower protrusion P1, and further forms an upper protrusion P2 by interaction with the upper molding die 110B. Accordingly, the lower protrusions P1 and the upper protrusions P2 are formed at a pitch interval between the lower side and the upper side of the parent material S. Of course, the punching unit 200 performs a punching process simultaneously with the protrusion forming process.

Fig. 5 (c) is a view showing a state where the upper mold 10 is lifted after the lower protrusion P1 and the upper protrusion P2 are formed on the lower side surface and the upper side surface of the base material S, and the upper molding tool 120A is lifted and the lower molding tool 120B is lowered simultaneously with or after the upper mold 10 is lifted.

Fig. 6 (a) is a diagram showing a state where the upper molding tool 120A is raised and the lower molding tool 120B is lowered, so that the upper molding tool 120A and the lower molding tool 120B do not contact each other even if the upper mold 10 is lowered, and as shown in fig. 6 (B), the protrusion molding process is not performed for a predetermined number of cycles.

The projection height of the projection is shown in fig. 1 to 6 in an enlarged manner, but the projection height of the projection P is only required to be able to realize interlayer division. Also, the projections may be removed by pressing the individual laminated cores C with additional pressing after being discharged from the core manufacturing apparatus according to the present embodiment. A protection groove 211 for preventing the projection P, particularly, the upper projection P2 from being pressed is formed on the surface (bottom surface) of the punching punch 210.

Fig. 7 is a perspective view showing an example of an adhesive laminated core and a sheet member which can be produced by an embodiment of the present invention, and fig. 8 is an example of a process flow chart showing a process of forming the sheet member of fig. 7. In order to form the sheet member shown in fig. 7, the preform S is transferred through the punching processes S1 and S2, the protrusion forming process S3, and the punching process S4 in this order, and the protrusion forming process is selectively performed at every predetermined plurality of pitches. Of course, the order of forming the sheet member L is not limited to the above example.

Referring to fig. 9 to 13, the laminating unit 300 integrates the sheet members L sequentially formed by punching the base material S, more specifically, heats the adhesive agent existing between the layers of the multi-layered sheet member L, and further integrates a predetermined number of sheet members L into one block.

More specifically, the laminating unit 300 includes: a heater 310 for heating an interlayer adhesive of the sheet member L continuously passing through a lamination Hole 300a, i.e., a lamination Hole; and a nip mechanism 320, i.e., a device (pincher) for nipping the laminated core member C, is provided on the lower side of the heater 310.

The lamination holes 300a are spaces where the sheet members L are stacked in the vertical direction and continuously moved to be integrated, and in the present embodiment, are formed to penetrate the lamination unit 300 in the vertical direction.

The heater 310 is a device for heating an adhesive (interlayer adhesive) present between the layers of the sheet member L to bond the layers of the sheet member, and is configured as a high-frequency induction heater in the present embodiment so that the bonding between the layers of the sheet member is rapidly performed. Since the high-frequency induction heating is known per se, an additional description thereof will be omitted, and in the present invention, the high-frequency induction heating is disclosed as a method of efficiently heating the adhesive present between the layers of the sheet member and minimizing the thermal influence on the surrounding members.

A curing hole which forms a curing space of the adhesive while passing the sheet member is formed inside the heater 310, and a lamination guide 330 for guiding the movement of the sheet member L is disposed in the curing hole, and the lamination guide 330 is preferably made of a non-conductive material, more specifically, an Engineering ceramic (Engineering Ceramics) material, so as to be free from the influence of the high-frequency induction heating.

The stacking guide 330 may have an integral block structure with a hollow interior such as a Ring Type (Ring Type) or a Barrel Type (Barrel Type) or a split Type structure provided inside the heater to be spaced apart from each other. Also, in consideration of thermal expansion and the like of the object to be heated (sheet member) and the laminated guide 330, it is preferable to form a Gap (Gap) between the inner peripheral surface of the curing hole and the laminated guide 330.

The nip mechanism 320 prevents a product discharged downward from the heater 310, that is, a laminated core C formed by integrating the thin sheet member L, from being rapidly lowered. For this, the nip mechanism 320 is provided at the lower side of the heater 310, and applies a lateral pressure to the laminated core C to prevent a sharp drop of the laminated core C.

Also, the laminating unit 300 further includes: the pressing member 340, i.e., an alignment pressing device (Squeezer), is for applying pressure (side pressure) to the side surface of the sheet member L moving downward from the upper side of the heater 310 toward the heater 310, thereby tightening the sheet member L.

The pressing member 340 is configured to apply a lateral pressure to the sheet member L such that the sheet members L sequentially formed by punching the base material S are stacked in an aligned state at the entrance portion of the lamination hole 300a, i.e., at the upper side of the heater 310, and the sheet member L is inserted into the pressing member 340 by interference while entering the inside of the pressing member 340. In other words, the pressing member 340 contracts the outer contour of the sheet member L, and the sheet member put into the lamination hole 300a is linearly aligned on the same axis in advance at the entrance area of the lamination hole.

In the present embodiment, the pressing member 340 aligns the sheet member L in a straight line in advance on the upper side of the heater 310, and the sheet member L is laminated in a state of being aligned by the pressing member 340, and passes through the pressing member 340 and enters the high-frequency induction heater, i.e., the inside of the heater 310. The pressing member 340 may be made of die-specific steel, such as SKD-11, etc.

The pressing member 340 is laminated on the lower side of the punching die 220 so as to be coaxial with the punching die 220, and although the outer diameter of the sheet member L is shown to be smaller than the punching die 220 in fig. 11, the dimensions of both are substantially the same as those of the same in the related art, and a sheet member having the same shape as the punching die 220, that is, the shape and the dimensions of the punched hole is formed, and the edge of the sheet member L passes through the upper side and the lower side of the laminated hole 300a in a state of being in close contact with the inner peripheral surface of the laminated hole 300a, particularly, the inner peripheral surface of the pressing member (interference insertion state).

The pressing member 340 is one of: in order to support the side surfaces (e.g., edges) of the sheet members L and prevent poor lamination alignment, i.e., poor alignment, of the sheet members L in order to enable the sheet members to be sequentially laminated, the pressing member 340 may be formed of a pressing Ring (Squeeze Ring) having the same shape as the inner hole, i.e., the punching hole, of the punching die 220.

For example, in the case of manufacturing the laminated core as shown in fig. 7, the pressing member 340 may be formed in a cylindrical shape penetrating in the up-down direction, but is not limited thereto.

As described above, the punching unit 200 punches the base material, the laminating unit 300 integrates the sheet members L sequentially manufactured by punching, the laminating hole 300a, which is the lamination hole 300a, is provided on the lower side of the punching die 220 to pass the sheet members L sequentially laminated by the punching unit 200 and integrate them, and the laminating hole 300a is provided coaxially with the punching die 220.

In addition, the nip mechanism 320 applies lateral pressure to the product passing through the inside, thereby helping the alignment of the product C moving downward through the heater 310 and preventing the product, i.e., the laminated core C, from being abruptly dropped.

The nip mechanism 320 includes a nip block 321 and an elastic member for elastically supporting the nip block 321, i.e., a nip spring 322, and nips a side of the laminated core C output from the heater 310, thereby preventing the laminated core C from sharply falling to the bottom of the lamination hole 300a after passing through the heater 310.

Referring to fig. 13, the crimp projections 321 are disposed in a plurality spaced apart from each other along the circumference of the laminated core C in the lamination hole 300a, for example, in the lamination hole 300a in a unit of a predetermined angle. The nip mechanism 320 may be of a Moving Type (Moving Type) or a fixed Type fixed at an original position, however, the Moving Type is preferable in view of thermal expansion. If the crimp spring 322 is omitted from fig. 13 and the crimp boss 321 is formed in a structure fixed to the home position without moving, it becomes an example of the fixed type crimp.

Since the crimp bosses 321 are arranged at a plurality of positions at intervals along the periphery of the laminated core C and are elastically supported by the crimp springs 322, i.e., elastic members, it is possible to apply an elastic side pressure, i.e., a clamping force, to the laminated core C.

The punching die 220, the pressing member 340, the stacking guide 330, and the nip mechanism 320 are arranged in the lower die 20 in the vertical direction, and are provided at the bottom of the lamination hole 300a so as to be able to ascend and descend: the support 500 is taken out for supporting the bottom surface of the product (laminated core) C discharged through the laminating and curing process.

The withdrawing supporter 500 descends in a state of supporting the laminated core C, and if the withdrawing supporter 500 reaches the bottom of the lamination hole (lamination barrel), a withdrawing cylinder (not shown) pushes the laminated core C toward a product withdrawing passage, thereby assisting the withdrawal of the product.

In fig. 11, although a space is formed between the lamination cores C, actually, the lower protrusion of the upper lamination core and the upper protrusion of the lower lamination core are laminated in a state of being in contact with each other, and after continuously passing through the lamination hole 300a by one pitch (the same thickness as one sheet member), they are lowered in a state of being mounted on the take-out support 500.

In the laminating unit 300, a high temperature is generated by the heater 310, and the configuration of the lower die 20, the punching die 220, the pressing member 340, and the like may thermally expand due to the high temperature generated by the heater 310, so that there may be a variation in the shape or size of the sheet member L, and a lamination failure of the sheet member L.

In the present embodiment, a cooling system for the lamination unit 300 is applied.

Referring to fig. 10 to 12, a cooling groove 341 is formed on an outer circumferential surface of the pressing member 340. The cooling fluid flows along the cooling groove 341 to prevent the pressing member 340 from being overheated.

In the present embodiment, the cooling groove 341 is formed in a spiral shape on the outer circumferential surface of the pressing member 340, and an upper groove 342 and a lower groove 343, which are connected to the upper end and the lower end of the cooling groove 341, respectively, and form a closed loop, are formed on the upper outer surface and the lower outer circumferential surface of the pressing member 340. As the cooling fluid, air may be used, but it is not limited thereto, and for example, a liquid cooling fluid may be used.

The laminating unit 300, particularly the pressing member 340, the stack guide 330, and the nip mechanism 320, are rotatably provided at the lower mold 20 in order to achieve the thickness uniformity of the laminated core. The lamination unit 300 rotates by a predetermined angle unit, for example, 120 ° at predetermined timing intervals, and reduces thickness deviation of the lamination core C by each portion, and improves perpendicularity, flatness, and the like.

In the present embodiment, the pressing member 340 is fixed inside a rotating Housing (Rotation Housing)350, and is rotatably supported by an upper fixing boss 600 fixed to the lower mold 20. The upper fixing protrusion 600 is fixedly built in the lower mold 20, and the rotary case 350 is rotatably provided inside the upper fixing protrusion 600.

The pressing member 340 rotates together with the rotary housing 350, and

upper bearings

601 and 602 rotatably supporting the rotary housing 350 are provided inside the upper fixing boss 600.

The upper fixing bump 600 of the present embodiment is a structure in which a plurality of bodies are stacked/assembled, but is not limited thereto. The rotary housing 350 has a cylindrical shape with a hollow interior, an upper flange (flange)351 protruding outward of the rotary housing 350 is formed at an upper end of the rotary housing 350, and a lower end of the rotary housing 350 protrudes inward of the rotary housing 350.

More specifically, the upper flange 351 is in surface contact with the bottom surface of the punching die 220, and the lower end of the rotary case 350 surrounds the lower end of the pressing member 340. The pressing member 340 is pressed into the inside of the rotary case 350 to be fixed.

Also, the upper fixing lug 600 includes: an upper supporter 610 rotatably supporting an upper half of the rotary case 350; a lower support 620 rotatably supporting a lower half of the rotary case 350; and an intermediate support 630 disposed between the upper support 610 and the lower support 620 to support a load of the upper support 610.

In this embodiment, the upper fixing projection 600 is provided in a mold fixture, the first upper bearing 601 is provided between an inner surface of the upper support 610 and an upper outer surface of the rotary case 350, and the second upper bearing 602 is also provided between an inner surface of the lower support 620 and a lower outer surface of the rotary case 350.

A gap between the upper flange 351 and the upper supporter 610 is sealed (Sealing), thereby preventing a cooling fluid (air in this embodiment) of the pressing member 340 from leaking.

Preferably, the upper fixing lug 600 is provided with a cooling passage 600 a. In the present embodiment, the cooling passage 600a is formed at the lower supporter 620 and is water-cooled to cool the upper fixing lugs 600 by circulation of water, however, other cooling fluids such as Oil (Oil) or Air (Air) may be used, and cooling passages may be applied to the upper supporter 610 and the middle supporter 630.

Further, the upper fixing lug 600 includes: an air supply portion 640 for supplying air for cooling to the cooling groove 341 of the pressing member; and an air discharge part 650 for discharging air for cooling from the cooling groove 341 of the pressing member.

In this embodiment, the air supply part 640 is provided in the lower support 620 to introduce air into the lower end of the cooling groove 341 formed in the outer circumferential surface of the pressing member 340. The air discharge unit 650 is provided in the upper support 610, and discharges air in the cooling groove 341 of the pressing member 340.

More specifically, the air for cooling supplied to the lower groove 343 of the pressing member 340 flows spirally along the cooling groove 341 toward the upper groove 342 of the pressing member while exchanging heat with the pressing member 340.

An air introduction groove 352 of a closed-loop circulation type is formed along the periphery of the rotary case 350 on the outer peripheral surface of the lower portion of the rotary case 350. An air supply hole 353 penetrating the rotary case 350 to introduce air into the rotary case 350 is formed in the air introduction groove 352. The air supply hole 353 communicates with the lower end portion of the cooling groove 341, more specifically, with the lower groove 343.

Further, a closed-loop circulation type air discharge groove 354 is formed along the periphery of the rotary casing 350 on the upper outer peripheral surface of the rotary casing 350, for example, the outer peripheral surface of the upper flange 351, and an air discharge hole 355 penetrating the rotary casing 350 is formed in the air discharge groove 354. The air discharge hole 355 communicates with an upper end portion of the cooling groove 341, more specifically, with the upper groove 342.

According to the present embodiment, the inner opening portion of the air supply hole 353 communicates with the lower groove 343 formed in the pressing member, and the inner opening portion of the air discharge hole 355 communicates with the upper groove 342 formed in the pressing member.

In the present embodiment, the air introduction groove 352 is horizontally formed at the same height as the lower groove 343, the air discharge groove 354 is horizontally formed at the same height as the upper groove 342, and the air supply hole 353 and the air discharge hole 355 horizontally penetrate the rotary case 350 in a lateral direction.

As described above, since the air introduction groove 352 and the air discharge groove 354, which are formed in a closed loop shape, are formed on the lower outer circumferential surface and the upper outer circumferential surface of the rotary case 350, respectively, even if the rotary case 350 rotates, the air supply part 640 and the air discharge part 650 can be always connected to the air introduction groove 352 and the air discharge groove 354, and thus the introduction and discharge of air can be stably performed.

In this embodiment, an air supply hole for guiding air from the air supply portion 640 to the air introduction groove 352 is formed in the lower supporter 620, and an air discharge hole for discharging air from the air discharge groove 354 to the outside is formed through the upper supporter 610.

When the air for cooling is discharged to the outside from the upper outer circumferential surface of the pressing member 340 through the air discharge holes 355, the air discharge holes 355 are connected to an exposed flow path covered by the bottom surface of the punching die 220 so that the air for cooling directly contacts the punching die 220 to perform heat exchange. That is, the air for cooling is discharged while contacting the punching die 220, thereby performing heat exchange.

In the present embodiment, the punching die 220 rotates integrally with the pressing member 340 and the rotary case 350. More specifically, the punching die 220 is fixed to an upper end of the rotary case 350 by a coupling element (not shown) such as a Bolt (Bolt), and rotates together with the rotary case 350.

And, the upper fixing lug 600 is provided with: an oil supply part 660 for introducing oil for lubricating and/or cooling the

upper bearings

601, 602 into the

upper bearings

601, 602; and an oil discharge portion 670 for discharging oil from the oil supply portion 660. Therefore, the

upper bearings

601 and 602 rotatably supporting the rotary housing 350 can be prevented from being damaged, the life of the

upper bearings

601 and 602 can be prolonged, and the function of cooling the upper fixing boss 600 can be performed.

Next, the nip mechanism 320 is provided to the rotatable nip housing 360 to rotate together with the nip housing 360, and the nip housing 360 is rotatably supported by the lower fixing projection 700 fixed to the lower mold 20. The lower fixing projection 700 is fixedly built in the lower mold 20, and the nip casing 360 is rotatably provided inside the lower fixing projection 700.

To achieve the rotation of the crimp housing 360, a lower bearing 701 rotatably supporting the crimp housing 360 is provided at an inner side of the lower fixing boss 700. The lower fixing protrusion 700 of the present embodiment has a hollow ring shape and is a one-piece body having a side wall with an "L" section, but is not limited thereto.

Further, the lower fixing lug 700 includes:

oil systems

710, 720, supplying (oil system 710)/discharging (oil system 720) oil for lubrication and/or cooling to the lower bearing 701 of the lower stationary lobe. The

oil systems

710, 720 of the lower fixing lug 700 may also perform the function of cooling the lower fixing lug 700. Of course, the lower fixing bump 700 may be provided with a water-cooling/air-cooling type cooling system.

An intermediate fixing protrusion 800 for receiving the heater 310 is provided between the upper fixing protrusion 600 and the lower fixing protrusion 700, and preferably, a cooling passage 800a is also provided in the intermediate fixing protrusion 800.

In the present embodiment, the cooling passage 800a of the middle fixing boss may be water-cooled to cool the upper fixing boss 600 by circulation of water, or other cooling fluid such as Oil (Oil) or Air (Air) may be used. Also, the stacking guide 330 described above is provided inside the middle fixing boss 800 so as to be simultaneously rotated together with the rotation housing 350 and the crimp housing 360 by being rotated according to the rotation of the rotation housing 350 and the crimp housing 360.

An upper end of the stacking guide 330 may be joined to a lower end of the rotary case 350, and a lower end of the stacking guide 330 may be joined to the crimp case 360. The stack guide 330 is rotated at the same speed by the rotation housing 350 and/or the nip housing 360.

In addition, the rotation housing 350 and the crimp housing 360 rotate simultaneously through the same angle. In this embodiment, pulleys (Pulley) are provided in the rotary housing 350 and the crimp housing 360, respectively.

Referring to fig. 14, when the pulley 356 of the rotating housing 350 is referred to as an upper pulley and the pulley 361 of the crimp housing 360 is referred to as a lower pulley, the upper pulley 356 and the lower pulley 361 have the same outer diameter so that the rotating housing 350 and the crimp housing 360 rotate at the same acceleration, and the upper pulley 356 and the lower pulley 361 are connected to a driving pulley 910 by belts (belts) 911 and 912, respectively.

The drive pulley 910 is rotated by a motor M connected to the drive pulley 910 by a pulley-belt power transmission mechanism via a drive belt 913, but the power connection is of course not limited thereto.

A core manufacturing apparatus according to an embodiment of the present invention is an apparatus capable of manufacturing a laminated core using a strip-shaped base material having a surface coated with an adhesive. For example, the core manufacturing apparatus according to an embodiment of the present invention is an apparatus capable of manufacturing a laminated core using a steel plate strip (self-bonding steel plate; SB steel plate) in which an adhesive layer in a semi-cured state is formed at a predetermined temperature or lower, and the laminated core can be manufactured by punching the base material to sequentially form sheet members, forming protrusions for interlayer division at predetermined intervals on the surface of the base material in conjunction with the punching process, and heating and melting the adhesive layer existing between the layers of the sheet members laminated in multiple layers and then curing the adhesive layer.

The present invention can provide a method for manufacturing an adhesive laminated core, the apparatus for manufacturing an adhesive laminated core including the steps of: forming an interlayer dividing projection on a base material having an adhesive layer; blanking the base material; the sheet member is integrated by lamination.

As described above, the embodiments according to the present invention have been described, and it is obvious to those having ordinary skill in the art that the present invention can be embodied in other specific forms without departing from the spirit or scope thereof, in addition to the embodiments described above.

Therefore, the above-described embodiments are not intended to be limiting, and should be regarded as illustrative embodiments, and the present invention is not limited to the above-described description, but may be modified within the scope of the appended claims and equivalents thereof.

Detailed Description

Another embodiment of the adhesive laminated core manufacturing apparatus according to the present invention will be described below with reference to fig. 15 to 18.

In the drawings for explaining one embodiment of the present invention, fig. 15 is a vertical sectional view schematically showing the structure of an adhesive laminated core manufacturing apparatus according to one embodiment of the present invention with reference to the transfer direction of a base material, fig. 16 is a view showing a state where a base material is supplied to an adhesive laminated core manufacturing apparatus according to another embodiment of the present invention, fig. 17 is a view showing a protrusion forming unit of the adhesive laminated core manufacturing apparatus shown in fig. 15 and 16, and fig. 18 is a perspective view of the protrusion forming unit shown in fig. 17.

Referring to fig. 15 to 18, the core manufacturing apparatus (adhesive laminated core manufacturing apparatus) according to the present embodiment is an apparatus for sequentially forming a laminated core C by punching a strip-shaped base material S having a surface coated with an adhesive layer 1.

The core manufacturing apparatus according to the present embodiment includes: a protrusion forming unit 100 for division between the laminated cores C; a blanking unit 200 for sequentially forming the sheet member L by blanking; and a laminating unit 300 that integrates the sheet member L into a predetermined number of sheets to form the laminated core C.

When the above-described laminated cores C are manufactured using a strip-shaped base material S having a surface coated with the adhesive layer 1, the protrusion forming unit 100 presses the base material to form a protrusion P, i.e., an interlayer division protrusion, so that division between the laminated cores C can be achieved. The protrusions P for interlayer division form a Gap (Gap) between two laminated sheet members adjacent to each other at the interface between the laminated cores, thereby reducing the contact area between the sheet members and preventing friction between the sheet members.

Since the punching unit 200 and the laminating unit 300 are the same as the embodiment (first embodiment) explained in the most preferred embodiment of the present invention, the same reference numerals are applied and the repeated explanation of the punching unit 200 and the laminating unit 300 of the present embodiment is omitted.

That is, the punching unit 200 includes a punching punch 210 and a punching die 220 to punch the base material to form the sheet member. The lamination unit 300 is disposed downstream of the protrusion forming unit 100 with respect to the transfer direction of the base material S, and sequentially manufactures the lamination core C.

In this embodiment, the protrusion forming unit 100 forms the above-described interlayer dividing protrusion P on the surface of the base material S at predetermined intervals. For example, the protrusion forming unit 100 may be configured to selectively synchronize (synchronize) the punching unit 200 such that the protrusion P is formed from one side surface or the other side surface of the base material S to the edge side every time punching is performed a predetermined number of times, and protrusion forming is performed at predetermined Timing (Timing) before the punching process.

The protrusion forming unit 100 forms the protrusion P on the parent material S in synchronization with the blanking unit 200 every time the parent material S is transferred by a predetermined plurality of pitches. In the case where the laminated core C is a 10-layer laminated body, which is a laminated body composed of ten thin sheet members, the projections P are formed in the same Pattern (Pattern) on the surface of the mother material S every time the mother material S is transferred by ten pitches.

The punching die 220 is provided in the lower die 20 at a distance of N pitches (N is a natural number of 1 or more) from the protrusion forming unit 100 in the transfer direction of the base material.

The protrusion forming unit 100 includes: a protrusion forming tool 130 configured to press one side surface of the base material to form the interlayer dividing protrusion P to protrude to the opposite side; a molding die 140 facing the protrusion molding tool 130. The protrusion forming tool 130 presses the base material S at predetermined intervals in synchronization with the punching unit 200 in order to form the protrusion P for interlayer division on the base material S.

Referring to fig. 15, the protrusion forming tool 130 is provided at any one of the upper support stand 10b and the lower support stand 20b disposed opposite to each other, and the forming die 140 is provided at the other, and the base material passes through between the upper support stand 10b and the lower support stand 20b one pitch at a time.

In the present embodiment, the upper support table 10b is provided with the projection forming tool 130, and the lower support table 20b is provided with the forming die 140, but of course, a structure opposite thereto can be realized.

In other words, the protrusion forming tool 130 of the present embodiment is provided on the upper support base 10b to press down one side surface, i.e., the top surface, of the base material S, and the forming die 140 is provided on the lower support base 20b to support the other side surface, i.e., the lower surface, of the base material S. More specifically, the protrusion forming tool 130 presses a side surface (top surface) of the base material downward at predetermined intervals in synchronization with the punching unit 200. Also, the molding die 140 partially supports the opposite side surfaces of the portion pressurized by the protrusion molding tool 130.

Therefore, according to the present embodiment, the projection P for interlayer division has a shape that projects downward from the lower side (bottom) of the base material S, and the projection forming unit 100 of the present embodiment may be referred to as an Embossing device (Embossing) that partially presses one side of the base material to project it to the opposite side.

The upper support table 10b may be a separate component from the upper mold 10, i.e., a component spaced upstream from the upper mold 10, or may be formed integrally with the upper mold 10 as in the embodiment shown in fig. 16. For example, the upper support table 10b may be movable (lifted and lowered integrally) integrally with the upper mold 10 as a part of the upper mold 10.

The lower support stand 20b may be a structure separated from the lower mold 20 by a pitch, or may be integrally formed with the lower mold 20 as shown in the embodiment of fig. 16.

The same base material as that described in the most preferred embodiment of the present invention may be used as the base material S, and if the above-described protrusion for interlayer division P is periodically formed only on one side of the upper side and the lower side of the base material S, the contact area between the thin sheet member in contact with the protrusion for interlayer division (for example, surface contact or point contact) and the thin sheet member on which the protrusion for interlayer division is formed can be localized, interlayer division can be realized, and the thin sheet members can be integrated by a predetermined number of sheets.

As described above, the protrusion forming tool 130 is provided on the upper support base 10b so as to press the upper side surface of the base material S downward, and when the upper support base 10b is integrated with the upper die 10, that is, when the upper support base 10b is a part of the upper die 10 as shown in fig. 16, the protrusion forming tool 130 is provided on the upper die 10 together with the punching punch 210.

In addition, when the forming die 140 is provided on the lower support base 20b and the lower support base 20b is integrated with the lower die 20, that is, when the lower support base 20b is a part of the lower die 20 as shown in fig. 16, the forming die 140 is provided on the lower die 20 together with the punching die 220.

The protrusion forming tool 130 is provided right above the forming die 140 in a manner facing the forming die 140. In the present embodiment, the protrusion forming tool 130 is mounted on the upper mold 10 and ascends and descends integrally with the upper mold 10.

The molding die 140 has a protrusion forming groove 141 formed at an upper side of the molding die 140, and the protrusion forming tool 130 has a pressing protrusion 131 facing the protrusion forming groove 141.

In this embodiment, the pressing projection 131 has a flat and thick tip end surface, and the interlayer dividing projection P is formed by pressing the surface of the base material to the side (lower side in this embodiment). The protrusion forming groove 141 is formed in a shape corresponding to a front end portion (lower end portion) of the pressing protrusion 131, and is formed at a position facing the pressing protrusion 131.

Therefore, the pressing protrusion 131 in this embodiment is disposed downward to press the upper surface of the base material to the lower side, and the molding die 140 is disposed at the lower side of the protrusion molding tool 130 to partially support the bottom surface of the base material. More specifically, a plurality of protrusion forming grooves 141 are formed in the forming die 140, and the protrusion forming tool 130 has a plurality of pressing protrusions 131.

The protrusion forming tool 130 is provided to the upper support base 10b so as to be movable up and down, and, as described above, is provided to the upper mold 10 so as to be movable up and down when the upper support base 10b is integrated with the upper mold 10. The protrusion forming tool 130 is mounted on the upper mold 10 so as to be able to be lifted and lowered independently of the upper mold 10.

For this purpose, a tool receiving portion 10a is formed in the upper mold 10, and the protrusion forming tool 130 is provided in the tool receiving portion 10a so as to be movable up and down. In this embodiment, the pressing projection 131 is provided on a tool base 132 that can be lifted and lowered. In other words, the tool base 132 is liftably provided to the tool housing portion 10a, and the front end (lower end) of the pressing projection 131 has a shape corresponding to the projection forming groove 141.

More specifically, the tool base 132 includes: a base body 132a to which a root portion (root portion) of the pressing projection 131 is attached; and a base cover 132b for fixing the root of the pressing protrusion 131 to the base body 132 a. Although not shown, the base cover 132b may be fixed to the base body 132a by fastening elements such as bolts (bolts).

The front end (lower end) of the pressing projection 131 may have a polygonal column shape having a triangular or quadrangular cross section, or a cylindrical or elliptic cylindrical shape. The protrusion forming groove 141 is a groove having the same shape as the shape of the distal end of the pressing protrusion 131. In the present embodiment, the pressing projection 131 has a cylindrical shape having a cross section perpendicular to the axis and having the same size and shape as a whole, but is not limited thereto, and for example, the front end portion of the pressing projection may have a shape having a constant thickness from the front end surface (lower end surface) to a predetermined distance, and the thickness may be increased or decreased from the front end surface of the pressing projection to a position at or above the predetermined distance. The interlayer dividing projection P reduces the contact area between adjacent laminated cores at the interface for dividing the laminated cores C, thereby preventing the laminated cores from contacting with each other.

The molding die 140 is provided with an Ejector (Ejector)142, such as an Ejector pin, for ejecting the interlayer dividing protrusion P from the protrusion molding groove 141. The ejector 142 is movably built in the protrusion forming groove 141 in an axial direction, and is elastically supported in an entrance direction of the protrusion forming groove 141. In the present embodiment, the ejector 142 is elastically supported in the upward direction.

More specifically, the ejector 142 is elastically supported by an elastic member 143 such as a spring, and is pushed into the inside of the protrusion forming groove 141 by the force of the pressing protrusion 131 pressing the parent material S. When the pitch between the protrusion forming tool 130 and the forming die 140 is increased by the rise of the upper die 10, the ejector 142 is restored to the original position by the elastic member 143, and pushes out the interlayer dividing protrusion P formed inside the protrusion forming groove 141 to the outside of the forming die 140.

In the present embodiment, when the ejector 142 is not subjected to an external force, the front end (upper end) of the ejector 142 is located at the same height as the surface (upper side) of the molding die 140, more specifically, the upper side of the lower die. The ejector 142 is formed in a stepped shape at a base portion thereof, and a stopper 144 constituting a movement limit of the ejector is provided at the molding die 140 so that the ejector 142 is not separated from the protrusion forming groove 141.

In fig. 18, four pressing protrusions 131 are arranged at positions eccentric from the center of the tool base 132 at the same angle, but the number of the pressing protrusions 131 is not limited thereto, and the arrangement structure of the pressing protrusions 131 may be changed according to the shape of the sheet member L. Also, the tool base 132 may be other shapes than circular, such as a quadrilateral shape.

As described above, the upper mold 10 may be divided into a plurality of bodies along the transfer direction of the base material S, or may be configured as an integral body. The lower mold 20 may be divided into a plurality of bodies along the transfer direction of the base material S, or may be configured as one integrated body. The core manufacturing apparatus illustrated in fig. 16 has a press structure including an integrated upper die and an integrated lower die.

As in the first embodiment of the present invention, the upper die 10 is provided with a presser (Pusher), i.e., a pressing member, which presses the parent material S toward the lower die 20. Therefore, when the upper die 10 is lowered, the upper surface of the base material S is pressed downward by the presser 12, and the base material S is pressurized toward the lower die 20.

The upper mold 10 and the lower mold 20 have the same configuration as the above-described embodiment (first embodiment), and the pusher 12 functions as a Stripper (Stripper) in the protrusion forming step, the punching (Piercing) step, and the like, and is also a pressing Plate or a pressure Plate, that is, a Pushing Plate, for pressing the base material S toward the lower mold 20 side in order to perform the protrusion forming step, the punching step, and the like.

The protrusion forming tool 130 is supported by the upper frame 11 of the upper mold so as to penetrate the pusher 12 and support the upper side surface of the base material S. For this purpose, the pusher 12 is formed with a tool hole 12d through which the tip end portion of the pressing projection 131 passes.

In addition, the protrusion forming tool 130 is lifted by means of a lifter 400, such as a cam mechanism or a hydraulic/pneumatic cylinder, so that the up-down position of the protrusion forming tool 130 is adjusted at the upper mold 10. In the present embodiment, at a time when the protrusion forming is required, the protrusion forming tool 130 is lowered by means of the lifter 400, so that the front end (lower end) of the protrusion forming tool 130 is pushed downward.

In other words, when the lifter 400 moves (pushes) the protrusion forming tool 130 toward the base material S at predetermined intervals, the upper surface of the base material S may be pressed downward by the protrusion forming tool 130 when the upper mold 10 is lowered. In this embodiment, the lifter 400h is provided in the tool receiving portion 10a of the upper mold and coupled to the protrusion forming tool 130.

Therefore, in the present embodiment, the protrusion forming tool 130 is lowered to the bottom dead center at every predetermined period by means of the lifter 400. After the protrusion forming process, the protrusion forming tool 130 is moved backward (raised) by the lifter 400 to prevent contact with the base material S until the next cycle.

For this, the lifter 400 lowers the protrusion forming tool 130 once inside the upper mold 10 every time the parent material S moves ten pitches. In the laminated structure of the sheet member shown in fig. 16, the broken line indicates a portion where interlayer adhesion is performed, and the solid line indicates a portion where interlayer division is performed by the projection P.

In the sheet member of the two adjacent layers in the solid line portion (constituting the interface of interlayer division), the above-described protrusion P for interlayer division is formed to protrude downward from the sheet member of the upper layer.

Referring to fig. 17, in the present embodiment, the lifter 400 may include: a lifting body 410 which supports the protrusion forming tool 130 and is provided in the tool receiving portion 10a of the upper mold so as to be capable of being lifted; and a lifter 420 for lifting the lifting body 410.

In the present embodiment, the lifting body 410 is fixed to the protrusion forming tool 130, more specifically, to the base body 132a of the tool base, and the protrusion forming tool 130 is integrally movable with the lifting body 410. As an example of the fixing manner of the tool base and the lifting body, a combination by means of a bolt or the like may be included. A lift rod 430 is vertically inserted through the lift 420 into the lift body 410.

The same lifter as described in the above-described first embodiment can be similarly applied to the lifter 400 according to the present embodiment.

Hereinafter, the operation of the protrusion forming unit 100 according to the present embodiment will be described in more detail with reference to fig. 19 and 20.

The parent material S is moved by a predetermined distance (one pitch) every one cycle of the upper die 10, that is, every one Stroke (Stroke) of punching, so as to pass between the pusher 12 and the die frame 22, and as shown in fig. 19 (a), if a predetermined portion of the parent material S reaches a protrusion forming position, at the same time or before, the protrusion forming tool 130 is lowered to a bottom dead center at the upper die 10 by means of the lifter 400.

As shown in fig. 19 (b), when the lower die 20 is lowered, the upper surface of the base material S is pressed by the pusher 12, and the lower surface of the base material S is brought into close contact with the lower die 20 and the forming die 140. At this time, the protrusion forming tool 130 presses the upper side surface of the base material S downward, and further forms the interlayer dividing protrusion P by interaction with the forming mold 140. At this time, the ejector 142 pushes the protrusion forming groove 141 to a rear side thereof by a pressing force of the pressing protrusion 131 to be lowered by a predetermined depth, and elastically supports the interlayer dividing protrusion P formed inside the protrusion forming groove 141 in a bottom (i.e., upper) direction of the protrusion forming groove. The protrusion forming process is performed and the punching process is performed in the punching unit 200.

Fig. 19 (c) is a view showing a state where the upper mold 10 is lifted after forming the protrusion P on the upper surface of the base material S, and when the upper mold 10 is lifted, the force pressing the ejector 142 is removed. Therefore, since the ejector 142 pushes the protrusion P for interlayer division and returns to the original position, the base material S can be smoothly separated from the molding die 140. Simultaneously with or after the upper mold 10 is raised, the protrusion forming tool 130 is raised to the top dead center at the upper mold 10 by means of the lifter 400.

Fig. 20 (a) is a diagram showing a state where the protrusion forming tool 130 is raised in the following manner: even if the upper mold 10 descends to press the parent material S downward, the protrusion forming tool 130 does not contact the parent material S, and the protrusion forming process is not performed during a predetermined plurality of cycles as shown in fig. 20 (b).

Fig. 21 is a view showing a laminated state of the sheet member molded by the core manufacturing apparatus of the present embodiment, and the laminated core C can be divided by using, as a boundary line, a sheet member having the protrusion for interlayer division protruding downward and a sheet member L laminated thereunder.

The protrusion height of the protrusion P is only required to realize interlayer division. Also, the projections may be removed by pressing the laminated core C with additional pressing after being discharged from the core manufacturing apparatus according to the present embodiment. This embodiment is a device that causes the protrusions for interlayer division to protrude downward from the sheet member, but division of the laminated core may also be achieved using the protrusions for interlayer division that protrude upward. For example, if the protrusion forming tool is provided in a lower mold and the forming mold is provided in an upper mold, the interlayer dividing protrusion protruding upward can be formed in the base material.

Fig. 22 is a view showing a process of molding the thin sheet member of fig. 7 by the core manufacturing apparatus according to the present embodiment, and fig. 23 is a sectional view showing a state in which the thin sheet member is laminated in the laminating unit of the core manufacturing apparatus according to the present embodiment.

Referring to fig. 22, in order to form the sheet member shown in fig. 7, the preform S is transferred through the punching processes S1 and S2, the protrusion forming process S3, and the punching process S4 in this order, and at this time, the protrusion forming process is periodically performed every time the preform S is transferred by a predetermined plurality of pitches, thereby forming the interlayer dividing protrusions (lower protrusions) on the preform. Of course, the order of forming the sheet member L is not limited to the above example.

As described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of claims and the equivalent thereof, and the first embodiment can be similarly applied to the configuration not described in the present embodiment.

Industrial applicability

The present invention relates to a core manufacturing apparatus for manufacturing cores used as rotors or stators of motors, generators, and the like, and more particularly, to a core manufacturing apparatus for manufacturing cores used as rotors or stators of motors, generators, and the like, which can continuously manufacture laminated cores in which thin sheet members are integrated by laminating a plurality of base material layers, and which can easily divide the laminated cores.

Claims

1. An adhesive laminated core manufacturing apparatus for sequentially forming a sheet member of a predetermined shape while passing a strip-shaped base material having a surface coated with an adhesive layer by a predetermined pitch each time, and sequentially manufacturing laminated cores including sheet members integrated by interlayer adhesion in a predetermined number of sheets, comprising:

a protrusion forming unit for pressing the base material to divide the laminated cores, so that protrusions for interlayer division are formed on the surface of the base material every time the base material is transferred by a plurality of preset pitches;

a blanking unit disposed at a downstream side than the protrusion forming unit to blank the parent material to sequentially form the sheet member; and

a lamination unit for integrating the sheet members to sequentially manufacture the laminated core,

wherein, the blanking unit includes:

a punching punch provided in a liftable upper die for pressing and punching the base material, the punching punch being disposed downstream of the protrusion forming unit with respect to a transfer direction of the base material; and

a punching die supported by a lower die disposed on a lower side of the upper die, having a punching hole facing the stamping part, and stacked on an upper side of the lamination unit,

the protrusion forming unit may be selectively synchronized with the blanking unit such that the protrusion is periodically formed at the mother material every time the blanking is performed a preset number of times.

2. The adhesive laminated core manufacturing apparatus according to claim 1,

the protrusion forming unit includes a forming member of at least one of a first forming member and a second forming member,

the first molding assembly includes: a lower molding die provided to the lower die; and an upper molding tool provided to the upper mold so as to face the lower molding tool, the second molding member including: an upper molding die provided to the upper die; and a lower molding tool provided to the lower mold so as to face the upper molding mold.

3. The adhesive laminated core manufacturing apparatus according to claim 2,

the lower part forming die has a lower part forming groove recessed downward from the upper side surface of the lower part forming die, and the upper part forming die has an upper part forming groove recessed upward from the lower side surface of the upper part forming die.

4. The adhesive laminated core manufacturing apparatus according to claim 3,

the upper molding tool is provided in the upper mold so as to be movable up and down, and the lower molding tool is provided in the lower mold so as to be movable up and down.

5. The adhesive laminated core manufacturing apparatus according to claim 3,

6. The adhesive laminated core manufacturing apparatus according to claim 5,

the first forming assembly is disposed at the one pitch distance from the second forming assembly.

7. The adhesive laminated core manufacturing apparatus according to claim 3,

the upper side surface of the lower molding die and the lower side surface of the upper molding die have surface shapes that are mirror-image plane-symmetrical to each other, and the upper molding die is provided at a position shifted by one pitch from directly above the lower molding die.

8. The adhesive laminated core manufacturing apparatus according to claim 2,

the upper mold comprises: the upper frame can be lifted; and a plate-shaped pusher provided below the upper frame to press the base material downward,

the upper forming tool is supported by the upper frame to penetrate the pusher and press the upper side surface of the base material, and the upper forming tool is supported by the upper frame to penetrate the pusher and support the upper side surface of the base material.

9. The adhesive laminated core manufacturing apparatus according to claim 1,

the upper mold is divided into a plurality of bodies along the transfer direction of the base material or is configured as one integrated body,

the lower mold is divided into a plurality of bodies along the transfer direction of the base material, or is configured as one integrated body.

10. The adhesive laminated core manufacturing apparatus according to claim 1,

11. The adhesive laminated core manufacturing apparatus of claim 10,

the punching die is provided in the lower die at a distance of N pitches from the protrusion forming unit in the transfer direction of the base material, where N is a natural number of 1 or more.

12. The adhesive laminated core manufacturing apparatus according to claim 1,

the laminating unit is rotatably provided to the lower mold.

13. The adhesive laminated core manufacturing apparatus according to claim 1,

the protrusion forming unit presses one side surface of the base material to form the interlayer division protrusion on the other side surface of the base material, in order to divide the laminated cores.

14. The adhesive laminated core manufacturing apparatus of claim 13,

the protrusion forming unit includes:

a protrusion forming tool including a pressing protrusion having a flat tip end surface and a tip end portion having a constant thickness for forming the protrusion for interlayer division, and pressing one surface of the base material at predetermined intervals in synchronization with the punching unit;

and a molding die facing the pressing projection and having a projection molding groove corresponding to a shape of a front end portion of the pressing projection.

15. The adhesive laminated core manufacturing apparatus of claim 14,

the pressing protrusion of the protrusion forming tool is downwardly disposed to press the upper side of the base material to the lower side, and the forming die is provided at the lower side of the protrusion forming tool to support the bottom surface of the base material.

16. The adhesive laminated core manufacturing apparatus of claim 15,

17. The adhesive laminated core manufacturing apparatus of claim 14,

the protrusion forming tool is selectively lowered by means of an elevator so that one side surface of the parent material is pressurized every predetermined period.

18. The adhesive laminated core manufacturing apparatus according to any one of claim 14 to claim 16,

the protrusion forming tool is provided on an upper support table, the forming die is provided on a lower support table, the upper support table is provided on an upper side of the lower support table in a liftable manner, the lower support table is provided on a lower side of the upper support table in a manner of facing the upper support table, the upper support table is integrated with the upper die or separated from the upper die, and the lower support table is integrated with the lower die or separated from the lower die.